[llvm] [TableGen][Intrinsics] Add KnownOverloadConflict allowlist for CheckOverloadSuffixConflicts (PR #195698)

[Rahul Joshi via llvm-commits]

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jurahul wrote:

This just seems to reiterate a common TableGen knowledge that's not specific to intrinsics. Maybe just drop it?

https://github.com/llvm/llvm-project/pull/195698